fix: npm installation error

[rubiin]

Updated rollup to solve installation error

Checklist

• PR contains only changes related; no stray files, etc.
• [] README updated (where applicable)
• [] Tests written (where applicable)

[codecov]

Codecov Report

Merging #1697 (e34c376) into master (b82d4e1) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master     #1697   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          101       101           
  Lines         1855      1862    +7     
=========================================
+ Hits          1855      1862    +7     

Impacted Files	Coverage Δ
src/lib/isBoolean.js	100.00% <0.00%> (ø)
src/lib/isLicensePlate.js	100.00% <0.00%> (ø)

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[rubiin]

rollup latest version doesnot seem to support older versions. Also node 6.0 is way old i think we should drop tests for it as its likely someone is using that

[fedeci]

Even if node 6 may not be used anymore this is a breaking change and should be released in a new major.

[rubiin]

Even if node 6 may not be used anymore this is a breaking change and should be released in a new major.

however its a blocker if you cant install the package dependencies after forking. @profnandaa

[rubiin]

tested on node v10,12 and v14.

[profnandaa]

Don't leave out Node 6 yet, there's a time it helped us catch an old browser incompatibility, see #1357

[rubiin]

@profnandaa fixed it without breaking support for node 6

[profnandaa]

@rubiin -- thanks!

[rubiin]

@profnandaa should i also make a pr to update eslint and some tools. They are way old